1: 1-methyl-1H-imidazole-4-carboxylic acid With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; triethylamine in tetrahydrofuran; N,N-dimethyl-formamide T=20°C; 0.333333 h; 2: O,N-dimethyl-hydroxylamine hydrochloride in tetrahydrofuran; N,N-dimethyl-formamide T=20°C; 18 h;

4-methyl-morpholine; Diethylcarbamazine; benzotriazol-1-ol in DMF (N,N-dimethyl-formamide) T=20°C;

in tetrahydrofuran; diethyl ether T=0 - 40°C; 4 h;